Synchronous tracking AM receiver

Details Synchronous tracking AM receiver Synchronous tracking AM receiver

1995-06-29

1997-02-11

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency or phase modulation

455258, 329359, H04B 116, H03D 100

Patent

active

056031114

ABSTRACT:
An improved synchronous tracking AM receiver having low power requirements and a small size. The synchronous tracking AM receiver provides signal tracking capability and sensitivity approaching a conventional superhetrodyne receiver. The synchronous tracking AM receiver includes an RF amplifier synchronous input section which couples input signals to a synchronization filter circuit, including a modified Colpitts oscillator. The Colpitts oscillator recycles the signal to generate a high Q output signal. The output signal of the synchronization circuit is coupled to a low pass filter, then amplified by a low frequency amplifier and triggered to produce a digital output signal.

REFERENCES:
patent: 3119065 (1964-01-01), Blake
Shrader, Robert L., Electronic Communication, 1985 pp. 207-208.
Funkschau, vol. 62, No. 20, 21 Sep. 1990, pp. 113-115 entitled "Einfacher Kurzwellen-Empfanger," Parts 1 and 2 (Portions Translated).
Elektor, vol. 10, No. 7/8, Jul. 1984, pp. 7-59, entitled "FM Pocket Radio" by P. Engel.
Elektor Book 75 (1977), p. 12, entitled "Sensitive Coil-Lists Sinchrodyne Receiver for MW LW".
IEEE Journal of Solid State Circuits, vol. SCE-20, No. 6, Dec. 1985, entitled "The Synchronous Oscillator: a Synchronization and Tracking Network," by Basil Uzunoglu and Marvin White.

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